匹配特定記錄的 MongoDB 正則表示式?


讓我們首先建立一個文件集合 -

> dbworkingOfRegularExpressionDemoinsertOne({ "StudentDetails" : { "StudentName" : "John" },"StudentAge":21 });
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5cf227acb64a577be5a2bc07")
}
> dbworkingOfRegularExpressionDemoinsertOne({ "StudentDetails" : { "StudentName" : "JOHN" },"StudentAge":19 });
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5cf227b8b64a577be5a2bc08")
}
> dbworkingOfRegularExpressionDemoinsertOne({ "StudentDetails" : { "StudentName" : "Carol" },"StudentAge":20 });
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5cf227c2b64a577be5a2bc09")
}

以下是使用 find() 方法從集合中顯示所有文件的查詢 -

> dbworkingOfRegularExpressionDemofind();

這將生成以下文件 -

{ "_id" : ObjectId("5cf227acb64a577be5a2bc07"), "StudentDetails" : { "StudentName" : "John" }, "StudentAge" : 21 }
{ "_id" : ObjectId("5cf227b8b64a577be5a2bc08"), "StudentDetails" : { "StudentName" : "JOHN" }, "StudentAge" : 19 }
{ "_id" : ObjectId("5cf227c2b64a577be5a2bc09"), "StudentDetails" : { "StudentName" : "Carol" }, "StudentAge" : 20 }
Following is the regular expression to get the document with StudentName JOHN:
> dbworkingOfRegularExpressionDemofind({'StudentDetailsStudentName': /JOHN/});

這將生成以下文件 -

{ "_id" : ObjectId("5cf227b8b64a577be5a2bc08"), "StudentDetails" : { "StudentName" : "JOHN" }, "StudentAge" : 19 }

更新於:2019-07-30

91 次瀏覽

提升 職業生涯

完成課程獲得認證

開始學習
廣告
© . All rights reserved.